Subs not workin..okies, so i'm not s'smart

Okies, so i'm kinda not-so-bright sometimes.

My subs keep goin on and off, and now they haven't been on in like three days.

It was that they'd come on for a bit when i'd take sharp corners and then go off again after a bit, or when I'd hit a bump.

Now they won't at all...i tried to check whatever exposed wiring I could get to but couldn't find anything loose. Should I just check again?